Cleanup some workarounds and warnings (#4735)

* Cleanup thread_local usage in FastRandom

* Use constexpr to avoid clang warning

* Fix more Wglobal-constructor warnings

* Make MSVC happy?

src/Statistics.cpp

@@ -6,6 +6,10 @@
 #include "Statistics.h"
 
 
+#ifdef __clang__
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wglobal-constructors"
+#endif
 
 cStatInfo cStatInfo::ms_Info[statCount] =
 {
@@ -76,6 +80,10 @@ cStatInfo cStatInfo::ms_Info[statCount] =
 	cStatInfo(statTreasureFished, "stat.treasureFished")
 };
 
+#ifdef __clang__
+	#pragma clang diagnostic pop
+#endif
+